OT HV Distribution Introduction

The positive High Voltage is brought to the anode wires of the
straw-tube modules
through the HV distribution system. This system distributes the high-voltage
bias from the
supply units
to the
HV Boards
in the detector
Front-End Electronics.
An overview of the HV distribution system is shown in the
figure below
(also available in
Autocad format).
The main feature of the system is that all individual
HV inputs of the HV Boards (HVB) in the FE boxes are available on
patch panels
in D3; however, each HV output channel of the supply units
is connected to groups of 8 (eight) HVB inputs.

The various components of this system
are discussed in detail in different sub-sections of the present document: